Title: 100 Math Brainteasers (Grade 7, 8, 9, 10). Arithmetic, Algebra and Geometry Brain Teasers, Puzzles, Games and Problems with Solutions: Math olympiad contest problems for elementary and middle schools, Author: Bartholomew Dyda
Title: 100 Math Brainteasers (Grade 7, 8, 9, 10). Arithmetic, Algebra and Geometry Brain Teasers, Games and Problems with Solutions, Author: Bartholomew Dyda
Title: 100 Jeux pour bien maîtriser les maths. La logique cc, Author: Zbigniew Romanowicz